Thanks for your information on the Brickells in Wales.My great great grandfather was John or Johann Brickle or Brikle and he died in Pembroke in Sep 1892. He was married to Elizabeth Michael (Mickle) who died in Feb 1899 in Pembroke.
They had 7 children: Abigail, Elizabeth, Catherine, William,John (my great grandfather), Ann and Mary.
Before moving to Pembroke John, Elzabeth and Abiigail were living in a lodging house in Llanelly at the time of the 1841 census but Abigail was born in Merthyr Tydfil on April 1, 1840.
I have looked on familysearch.org at German Births and deaths and found a Johan Brikle born May 9, 1814 in Herbolzheim (A. Emmendingen) Freburg, Baden, Germany. His father's name is Johann Brikle and his mothers name is Theresia Schmidt. There is no death information for Johann Brikle (Could this be because he died in Pembroke)
I also found an Elizabeth Mickle born in the same are in Oct 18, 1819.
I do not know what you think about my information and how it compares with your information?
I would also be interested to know about your interest on the Brickles of Wales?
I do not know why John Brickle would go to Merthyr Tydfil where Abigail was born and then on to Llanelly wher he was in 1841 and then on to Pembroke in 1851. It seems that he was a musician or fiddler during this period.
Anyway I would welcome any more information that you have? Best of luck